Definition

1. Noun:
   • A control system with a feedback loop that is active: A "closed loop" is a system where the output is continuously measured and compared to a desired setpoint. The difference (error) is used to adjust the system's input automatically, creating a self-regulating process.

Usage

• Noun:
  • The thermostat maintains room temperature using a closed loop.
  • Modern engine management relies on a closed loop system to optimize fuel injection.

Advanced Usage

• "Closed-loop control": This is the full technical term for the application of a closed loop.
  • The factory upgraded its machinery with closed-loop control for greater precision.
• "Operating in a closed loop": Describes a system functioning with automatic feedback.
  • The chemical reactor is now operating in a closed loop, which has improved safety.

Variants and Related Words

• Feedback loop (n): The circular path of information where output is returned as input to influence the process. This is the core component of a closed loop.
  • The stability of the system depends on the design of its feedback loop.
• Open loop (n): A control system without active feedback, where the output does not affect the input.
  • An irrigation timer is an example of an open loop system.

Synonyms

• Automatic control system: A system that regulates itself without constant human intervention.
• Feedback control system: A system that uses feedback to maintain desired performance.

Related Phrases

• Close the loop: This phrasal verb means to complete a feedback cycle, often in business or communication contexts, by providing a final response or result.
  • After reviewing your report, I will close the loop with the management team.

Related Idioms

Noun

1. a control system with a feedback loop that is active